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The Whadda 3D Xmas Tree Kit is aimed at hobbyists and beginners who are interested in soldering and electronics. With this DIY kit, you can build a festive LED Christmas tree. Features 16 flashing red LEDs Extra green and yellow LEDs provided to customise your tree Can be hung on and fed through wires Will operate on 12 V DC (e.g. in cars) Specifications Low power consumption 8 mA Power supply 9 V battery operation (not included) Dimensions 102 x 88 x 80 mm Weight 65 g Downloads Manual

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Temporary Delay in the Delivery of Unitree Robots Like many other suppliers, we are currently experiencing delays in the delivery of Unitree robots. A shipment from our supplier is currently held in customs, which has unfortunately led to later-than-planned deliveries for previously placed orders. We are actively working with our supplier to resolve this issue and expect more clarity soon, but at this time, we cannot provide any guarantees. Additionally, a new shipment is already on its way, though it will take some time to arrive. Since other suppliers are facing similar challenges, switching to a different provider is unlikely to result in a faster solution. Our top priority remains fulfilling existing orders. If you have any questions or would like to update your order, please do not hesitate to contact our customer service team. We will keep you informed of any further developments. Unitree Go2 series consists of quadruped robots for the research & development of autonomous systems in the fields of human-robot interaction (HRI), SLAM & transportation. Due to the four legs, as well as the 12DOF, this robot can handle a variety of different terrains. The Go2 comes with a perfected drive & power management system, which enables a speed (depending on the version) of up to 3.7 m/s or 11.88 km/h with an operating time of up to 4 hours. Furthermore, the motors have a torque of 45 N.m at the body/thighs and at the knees, which also allow jumps or backflips. Features Super Recognition System: 4D LIDAR L1 Max Running Speed: approx. 5 m/s Peak Joint Torque: approx. 45 N.m Wireless Module: WiFi 6/Bluetooth/4G Ultra-long battery Endurance: approx. 2-4 h (long battery life measured in real life) Intelligent Side-follow System: ISS 2.0 Specifications Tracking module: Remote-controlled or automatic tracking Front camera: Image tansmission Resolution 1280x720, FOV 120°, Ultra wide angle lens deliver rich clarity Front lamp: Brightly lights the way ahead 4D LiDAR L1: 360°x90° omnidirectional ultra-wide-angle scanning allows automatic avoidance with small blind spot and stable operation 12 knee joint motors: Strong and powerful, Beautiful and simple, Brandy new visual experience Intercom microphone: Effective communication with no scenario restrictions Self-retracting strap: Easy to carry and load things More stable, more powerful with advanced devices: 3D LiDAR, 4G ESIM Card, WiFi 6 with Dual-band, Bluetooth 5.2 for stable connection and remote control Powerful Computing Core: Motion controller, High-performance ARM processor, Improved Al algorithm processor, External ORIN NX/NANO Smart battery: Standard 8000 mAh battery, Long-endurance 15000 mAh battery, Protection from over-temp, overcharge and short-circuit Speaker for music play: Listen to music as your pleasure Unitree Go2 Variants The Go2 impresses not only with its technical capabilities, but also with a modern and slim design that gives it a futuristic look and makes it a real eye-catcher. The Go2 Air is specially designed for demos and presentations. With its basic features, it offers a solid basis for demonstrating the movement capabilities and functionality of a four-legged robot. Important: The Go2 Air is delivered without a controller. This can be purchased optionally. With a powerful 8-core high-performance CPU, the Pro and Edu offer impressive computing power required for complex tasks and demanding calculations. This enables faster and more efficient data processing and makes the Pro and Edu a reliable partner for your projects. From the Edu version onwards, the Go2 is programmable and opens up endless possibilities for developing and researching your own robotics applications. The Go2 is also able to handle a step height of up to 14 cm. This makes it an ideal tool for research, education and entry into the world of robotics. The Go2 Edu comes with a remote controller that gives you easy and intuitive control. You also get a docking station with impressive computing power of 100 TOPS, which is equipped with powerful AI algorithms and offers you technical support. Go2 Edu is equipped with a powerful 15000 mAh battery that gives it an impressive runtime of up to 4 hours. This long operating time allows the robot to carry out longer exploration missions and complete demanding tasks. Go2 Edu Plus 3D LiDAR comes with a powerful Hesai XT16 3D LiDAR. This LiDAR sensor gives the robot precise three-dimensional perception of its surroundings, enabling smooth navigation and intelligent obstacle avoidance. Model Comparison Air Pro Edu/Edu Plus Dimensions (standing) 70 x 31 x 40 cm 70 x 31 x 40 cm 70 x 31 x 40 cm Dimensions (crouching) 76 x 31 x 20 cm 76 x 31 x 20 cm 76 x 31 x 20 cm Material Aluminium alloy + High strength engineering plastic Aluminium alloy + High strength engineering plastic Aluminium alloy + High strength engineering plastic Weight (with battery) about 15 kg about 15 kg about 15 kg Voltage 28~33.6 V 28~33.6 V 28~33.6 V Peaking capacity about 3000 W about 3000 W about 3000 W Payload ≈7 kg (MAX ~ 10 kg) ≈8 kg (MAX ~ 10 kg) ≈8 kg (MAX ~ 12 kg) Speed 0~2.5 m/s 0~3.5 m/s 0~3.7 m/s (MAX ~ 5 m/s) Max Climb Drop Height about 15 cm about 16 cm about 16 cm Max Climb Angle 30° 40° 40° Basic Computing Power N/A 8-core High-performance CPU 8-core High-performance CPU Aluminum knee joint motor 12 set 12 set 12 set Intra-joint circuit (knee) ✓ ✓ ✓ Joint Heat Pipe Cooler ✓ ✓ ✓ Range of Motion Body: −48~48° Body: −48~48° Body: −48~48° Thigh: −200°~90° Thigh: −200°~90° Thigh: −200°~90° Shank: −156°~−48° Shank: −156°~−48° Shank: −156°~−48° Max Torque N/A about 45 N.m about 45 N.m Super-wide-angle 3D LiDAR ✓ ✓ ✓ Wireless Vector Positioning Tracking Module N/A ✓ ✓ HD Wide-angle Camera ✓ ✓ ✓ Foot-end force sensor N/A N/A ✓ Basic Action ✓ ✓ ✓ Auto-scaling strap N/A ✓ N/A Upgraded Intelligent OTA ✓ ✓ ✓ RTT 2.0 Image Transmission ✓ ✓ ✓ App Basic Remote Control ✓ ✓ ✓ App Data Viewing ✓ ✓ ✓ App Graphical Programme ✓ ✓ ✓ Front Lamp (3 W) ✓ ✓ ✓ WiFi 6 with Dual-band ✓ ✓ ✓ Bluetooth 5.2/4.2/2.1 ✓ ✓ ✓ 4G Module N/A CN/GB CN/GB Voice Function N/A ✓ ✓ Music Playback N/A ✓ ✓ ISS 2.0 Intelligent side-follow system N/A ✓ ✓ Intelligent detection and avoidance ✓ ✓ ✓ Secondary development N/A N/A ✓ Manual controller Optional Optional ✓ High computing power module N/A N/A Edu: 40 TOPS computing power Edu Plus: 100 TOPS computing power NVIDIA Jetson Orin (optional) Smart Battery Standard (8000 mAh) Standard (8000 mAh) Long endurance (15000 mAh) Battery Life 1-2 h 1-2 h 2-4 h Charger Standard (33.6 V, 3.5 A) Standard (33.6 V, 3.5 A) Fast charge (33.6 V, 9 A) Included 1x Unitree Go2 Edu Plus 3D LiDAR 1x Hesai XT16 3D LiDAR 1x Unitree Go2 Remote Controller 1x Unitree Go2 Battery (15000 mAh) 1x Unitree Docking station with 100 TOPS computing power Downloads Documentation iOS/Android apps GitHub

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Learn to 3D Model & 3D Print with Tinkercad With this book and the complementary videos, you’ll be 3D printing in no time at all. This course is meant to have you make casings for electronic components but also goes into optimizing your print technique as well as adding a little flair to your 3D creations. The course is perfect for you if you just bought your (first) 3D printer and want to print your own designs as soon as possible while also being able to get more background information. You’ll get to know the workings of a 3D printer and what software to use to model your object, not forgetting to make it print perfectly. We’ll even use the magic of 3D printing to create things that appear impossible to make (this fast and simple) with any other rapid-prototyping technique. At the end of this course, it’ll be second nature for you to design an object for 3D printing and fine-tune your print-setting to get the perfect print! The book includes the following 7 video tutorials: Introduction Basic 3D modeling for 3D printing Modeling a casing Post-processing Pushing the limits Movable parts Snap fits

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An Ultra-Rapid Programming Course This book serves as the very first step to for novices to learn Python programming. The book is divided into ten chapters. In the first chapter, readers are introduced to the basics of Python. It has the detailed instructions for installation on various platforms such as macOS, Windows, FreeBSD, and Linux. It also covers the other aspects of Python programming such as IDEs and Package Manager. The second chapter is where the readers get an opportunity to have a detailed hands-on with Python programming. It covers a group of built-in data structures popularly known as Python Collections. The third chapter covers the important concepts of strings, functions, and recursion. The fourth chapter focuses on the Object-Oriented Programming with Python. The fifth chapter discusses most commonly used custom data structures such as stack and queue. The sixth chapter spurs the creativity of the readers with Python’s Turtle graphics library. The seventh chapter explores animations and game development using the Pygame library. The eighth chapter covers handling data stored in a variety of file formats. The ninth chapter covers the area of Image processing with Wand library in Python. The tenth and the final chapter presents an array of assorted handy topics in Python. The entire book follows a step-by-step approach. The explanation of the topic is always followed by a detailed code example. The code examples are also explained in suitable detail and they are followed by the output in the form of text or screenshot wherever possible. Readers will become comfortable with Python programming language by closely following the concepts and the code examples in this book. The book also has references to external resources for readers to explore further. A download of the software code, and links to tutorial videos can be found on the Elektor website.

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Specifications Channels: 3 Total Power: 195 Watts Max. Voltage: 30 Volts Max. Current: 3 Amps Low ripple and noise: <350 μVrms/2 mVpp Excellent linear regulation rate and load regulation rate Fast transient response time: <50 μs Some channels are isolated Standard OVP/OCP/OTP protection functions Standard timing output Built-in V,A,W measurements and waveform display Independent control for each channel 3.5 inch TFT display Included 1x Rigol DP832 DC Power Supply 1x Power cord 1x USB cable

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This is the second edition of a book aimed at engineers, scientists, and hobbyists who want to interface PCs with hardware projects using graphical user interfaces. Desktop and web-based applications are covered. The programming language used is Python 3, which is one of the most popular languages around: speed of programming being a key feature. The book has been revised and updated with an emphasis on getting the user to produce practical designs with ease – a text editor is all that is required to produce Python programs. Hardware interfacing is achieved using an Arduino Uno as a remote slave. A full description and source code of the communication interface is given in the book. The slave provides digital and analog input and outputs. Multiple Unos can be included in one project with all control code written in Python and running on a PC One project involves a PIC microcontroller with the code provided that can be loaded into the PIC using the Uno. The web applications and server are all implemented in Python, allowing you to access your electronic hardware over the Internet. The Raspberry Pi computer can be used as your web server. An introductory chapter is provided to get you started with using Linux. The book is written for use with Debian or variations including Mint or Ubuntu. All of the programs in the book are freely available, ready to use and experiment with by way of a download from Elektor.

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Learn to use Python productively in real-life scenarios at work and in everyday life If you have mastered the basics of Python and are wanting to explore the language in more depth, this book is for you. By means of concrete examples used in different applications, the book illustrates many aspects of programming (e.g. algorithms, recursion, data structures) and helps problem-solving strategies. Including general ideas and solutions, the specifics of Python and how these can be practically applied are discussed. Python 3 for Science and Engineering Applications includes: practical and goal-oriented learning basic Python techniques modern Python 3.6+ including comprehensions, decorators and generators complete code available online more than 40 exercises, solutions documented online no additional packages or installation required, 100% pure Python Topics cover: identifying large prime numbers and computing Pi writing and understanding recursive functions with memorisation computing in parallel and utilising all system cores processing text data and encrypting messages comprehending backtracking and solving Sudokus analysing and simulating games of chance to develop optimal winning strategies handling genetic code and generating extremely long palindromes Downloads Software

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SPD3000X Series Linear Programmable DC Power Supply has a 4.3 inches TFT LCD display, Supports Programmability and Real Time Wave Display, bringing a new experience to users. It has three isolated outputs: two adjustable channels and one selectable channel from 2.5V, 3.3V, and 5V. It also has output short and overload protect function, and can be used in production and development. Features 3 independent controlled and isolated output, 32V/3.2A×2, 2.5V/3.3V/5V/3.2A×1, total 220W. 5 digits Voltage, 4 digits Current Display, Minimum Resolution: 1mV/1mA. Supports panel timing output functions. 4.3 inch true color TFT LCD 480x272 pixel display. 3 kinds of output modes: independent, series, parallel. 100V/120V/220V/230V compatible design to meet the needs of different power grids. Intelligent temperature-controlled fan, effectively reducing noise. Clear graphical interface, with the waveform display function Internal 5 groups of system parameter save/recall, supports data storage space expansion. Provides PC software: Easypower, supports SCPI, LabVIEW driver. High-resolution and high-precision output The highest resolution of 1mV/1mA, provides excellent setting and read back accuracy. This ensures accurate output even with very with small changes in voltage or current. This is impossible for a low resolution power supply. Series/parallel/independent mode function Series and parallel function allows two channels combined into one output with more power output capability, extending the application range. Each of 3 channels power can be turned on or off independently and also can be turned all on or all off. Panel displays the timing output Through the panel operation, 5 groups of timing settings and output control can be displayed, which provides users a simple power programming function. Also a connection can be made with Siglent’s EasyPower PC software providing a full range of communication and control requirements. Save/Recall setting parameters SPD3000X series programmable power supply can save or recall 5 groups of setting parameter in internal storage, also supports external storage expansion. You can easily obtain the settings you needed.

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SPD3000X Series Linear Programmable DC Power Supply has a 4.3-inches TFT LCD display, Supports Programmability and Real Time Wave Display, bringing a new experience to users. It has three isolated outputs: two adjustable channels and one selectable channel from 2.5V, 3.3V, and 5V. It also has output short and overload protect function, and can be used in production and development. Features 3 independent controlled and isolated output, 32V/3.2A×2, 2.5V/3.3V/5V/3.2A×1, total 220W. 5 digits Voltage, 4digits Current Display, Minimum Resolution: 10mV/10mA. Supports panel timing output functions. 4.3 inch true color TFT LCD 480x272 pixel display. 3 kinds of output modes: independent, series, parallel. 100V/120V/220V/230V compatible design to meet the needs of different power grids. Intelligent temperature-controlled fan, effectively reducing noise. Clear graphical interface, with the waveform display function Internal 5 groups of system parameter save/recall, supports data storage space expansion. Provides PC software: Easypower, supports SCPI, LabVIEW driver. High-resolution and high-precision output The highest resolution of 10mV/10mA, provides excellent setting and read back accuracy. This ensures accurate output even with very with small changes in voltage or current. This is impossible for a low resolution power supply. Series/parallel/independent mode function Series and parallel function allows two channels combined into one output with more power output capability, extending the application range. Each of 3 channels power can be turned on or off independently and also can be turned all on or all off. Panel displays the timing output Through the panel operation, 5 groups of timing settings and output control can be displayed, which provides users a simple power programming function. Also a connection can be made with Siglent’s EasyPower PC software providing a full range of communication and control requirements. Save/Recall setting parameters SPD3000X series programmable power supply can save or recall 5 groups of setting parameter in internal storage, also supports external storage expansion. You can easily obtain the settings you needed.

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The FNIRSI 2D15P is a compact 3-in-1 test tool combining a 2-channel digital oscilloscope, True RMS multimeter, and waveform generator in one device. With a 4.3" capacitive touchscreen, 100 MHz bandwidth, 500 MSa/s sampling rate, and up to 1,200 fps capture speed, it’s ideal for fast troubleshooting, signal analysis, and electronics testing. Features Dual-Channel Input (100 MHz single-channel, 50 MHz dual-channel operation) Selectable Memory Depths 20 MHz Bandwidth Limit Grayscale & Color Temperature Visualization Math Operations (Add, Subtract, Multiply, Divide, etc.) XY Mode & Infinite Persistence Cursor Function & 13 Auto Measurements Auto / Normal / Single Trigger Modes True RMS Multimeter (19,999 Counts) 10 MHz DDS Signal Generator Specifications General Display 4.3" IPS Capacitive Touchscreen Operation Touch + Knob + Physical Buttons Charging USB-C (12 V/1 A fast charging) Battery 5000 mAh Lithium battery Dimensions 19.6 x 12.9 x 5.7 cm Weight 1.1 kg Oscilloscope Channels 2 Analog Bandwidth 100 MHz Sample Rate 500 MSa/s Memory Depth 10K, 100K, 1M Input Impedance 1 MΩ Timebase Range 5ns - 50s Vertical Sensitivity 10 mV - 10 V/div Max Input Voltage 800 V (x10 Probe) Trigger Mode Auto, Normal, Single Trigger Type Rising, Falling, Both Edges Coupling AC/DC Persistence min / 2s / 5s / 10s / 20s / 50s / ∞ Math Operations Yes Waveform Capture Yes Waveform Export Yes Cursor Measurement Yes Multimeter DC Voltage 1.9999V / 19.999V / 199.99V / 1000V AC Voltage 1.9999V / 19.999V / 199.99V / 750.0V DC Current 19.999mA / 199.99mA / 1.9999A / 9.999A AC Current 19.999mA / 199.99mA / 1.9999A / 9.999A Resistance 19.999MΩ / 1.9999MΩ / 199.99KΩ / 19.999KΩ / 1.9999KΩ / 199.99Ω Capacitance 999.9uF / 99.99uF / 9.999uF / 999.9nF / 99.99nF / 9.999nF / 9.999mF / 99.99mF Diode Yes Continuity Yes Signal Generator Channels 1 Frequency 0–10 MHz Amplitude 0.1–3.0 Vpp Duty Cycle 0–100% Included 1x FNIRSI 2D15P Oscilloscope 2x P6100 Oscilloscope Probes 1x Multimeter Probe 1x Alligator Clip Probe 1x USB Data Cable 1x Manual Downloads Manual Firmware V2.0.0.7

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This book is about the Raspberry Pi 3 computer and its use in various control and monitoring applications. The book explains in simple terms and with tested and working example projects, how to configure the Raspberry Pi 3 computer, how to install and use the Linux operating system, and how to write hardware based applications programs using the Python programming language. The nice feature of this book is that it covers many Raspberry Pi 3 based hardware projects using the latest hardware modules such as the Sense HAT, Swiss Pi, MotoPi, Camera module, and many other state of the art analog and digital sensors. An important feature of the Raspberry Pi 3 is that it contains on-board Bluetooth and Wi-Fi modules. Example projects are given in the book on using the Wi-Fi and the Bluetooth modules to show how real-data can be sent to the Cloud using the Wi-Fi module, and also how to communicate with an Android based mobile phone using the Bluetooth module. The book is ideal for self-study, and is intended for electronic/electrical engineering students, practising engineers, research students, and for hobbyists. It is recommended that the book should be followed in the given Chapter order. Over 30 projects are given in the book. All the projects in the book are based on the Python programming language and they have been fully tested. Full program listings of every project are given in the book with comments and full descriptions. Experienced programmers should find it easy to modify and update the programs to suit their needs. The following sub-headings are given for each project to make it as easy as possible for the readers to follow the projects: Project title Description Aim of the project Raspberry Pi type Block diagram Circuit diagram Program listing

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The FNIRDSI DSO-TC4 is a multifunctional transistor oscilloscope that is both comprehensive and practical. It is designed for use in maintenance and R&D applications, integrating an oscilloscope, transistor tester, and signal generator into a single device. Features Equipped with a 2.8-inch TFT color screen for a clear and intuitive display Built-in high-capacity rechargeable lithium battery (1500 mAh) with a standby time of up to 4 hours Compact and lightweight, ideal for mobile use Specifications Oscilloscope Analog Bandwidth 10 MHz Real-Time Sampling Rate 48 MSa/s Input Impedance 1 MΩ Coupling Mode AC/DC Test Voltage Range 1:1 Probe: 80 Vpp (+40 V) 10:1 Probe: 800 Vpp (+400 V) Vertical Sensitivity 10 mV/div~10 V/div (X1 range) Vertical Displacement Adjustable with indication Time Base Range 50ns~20s Trigger Mode Auto/Normal/Single Trigger Type Rising edge, Falling edge Trigger Level Adjustable with indication Waveform Freeze Yes (HOLD function) Automatic Measurement Max, Min, Avg, RMS, Vpp, Frequency, Cycle, Duty Cycle Component Tester Transistor Amplification factor "hfe"; Base-Emitter voltage "Ube", Ic/Ie, Collector-Emitter reverse leakage current "Iceo", Ices, Forward voltage drop of protection diode "Uf" Diode Forward voltage drop <5 V (Forward voltage drop, Junction capacitance, Reverse leakage current) Zener Diode 0.01~32 V Reverse Breakdown Voltage (K-A-A Test Area) Field-Effect Transistor (FET) JFET: Gate capacitance "Cg", Drain current Id under "Vgs", Forward voltage drop of protection diode "Uf" IGBT: Drain current Id under Vgs, Forward voltage drop of protection diode Uf MIOSTET: Threshold voltage "Vt", Gate capacitance "Cg", Drain-Source resistance "Rds", Forward voltage drop of protection diode "Uf" Unidirectional SCR Trigger voltage <5V, Gate level (Gate voltage) Bidirectional SCR Trigger current <6mA (Gate voltage) Capacitor 25pF~100mF, Capacitance value, Loss factor "Vloss" Resistor 0.01Ω~50MΩ Inductor 10μH~1000μH, DC resistance DS18B20 Temperature sensor, Pins: GND, DQ, VDD DHT11 Temperature and humidity sensor, Pins: VDD, DATA, GND Signal Generator Output Waveform Supports 13 waveform outputs Waveform Frequency 0-50 KHz Square Wave Duty Cycle 0-100% Waveform Amplitude 0.1-3.0 V General Display 2.8-inch TFT color screen Backlight Brightness adjustable Power Supply USB-C (5 V/1 A） Battery 3.7 V/1500 mAh Languages English, German, Spanish, Portuguese, Russian, Chinese, Japanese, Korean Dimensions 90 x 142 x 27.5 mm Weight 186 g Included 1x FNIRSI DSO-TC4 (3-in-1) Oscilloscope (10 MHz) 1x P6100 Oscilloscope probes (10X) 1x Alligator clip probe 3x Test hooks 1x Adapter 1x USB-C charging cable 1x Manual Downloads Manual Firmware V0.0.7 (+V1.0.9)

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